Granted Patent
Utility
US 5,357,884 · App. 07/954,035
All purpose coulter drill
Inventor:
Gerard Bourgault
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Sep 30, 1992
Inventor
Gerard Bourgault
Assignee (at issue)
F. P. Bourgault Industries Air Seeder Division Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.